Electric traction-elevator.



DE WITT C. SVUPLEE. ELECTRIC TRAGTION ELEVATOR.

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Patented -N ov, 24, 1908.

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IIIIIW" l Ill' f Patented 1\Imf.24,19084 3 SHEETS-SHEET 3.

AN z im. 3 m f 1, 47%, l 4 lz i; .f 0 IA 97B 0 xi Q00 M9 wM838 8 A oo 9 a v .Csi 40 l, .m 9N 6 7 IIII IJ :k .am M new e.\. l r Wl o oooooo .l I 0 GODfmv u l Q .f /f a; a l 1...... 7 ma I f tion maybe made without departing from tailed vien'7 showing one manner of connect- DE WITT C. SUPLEE, PHlLADELPHIA, PENNSYLVANIA, ASSIGNOR TO SUPL'EEELEVATOR COMPANY, A CORPORATION 0F PENNSYLVANIA.

ELECTRIC TRACTION-ELEVATOR.

speciacatioii of .Lettere Patent.

Patented Nov. 24, 1908.

Application filed January 3, 1908. lSerial No. 409,217.

in elect-ric traction elevators,iand it has for` its object to provide a construction in which the `hoisting cables preferably consistof a plurality ot' sets or groups which are connected to the elevator car at different points and which cables are adapted to travel at al1 points in unison with the elevator car.

Other objects of /niy` invention will be apparent from' the detailed description thereof. 'A convenient embodiment of my invention is illustrated in the accompanying drawings' forming'apart of this specification, but it is to be understood that changes in constructhe saine;

- In the drawings,-Fignre l is a side elevation of a construction of elevator embodying my invention, a portion of the shatter Well at tliebottom being shown in section;-

Fig. 2 a view in elevation of my linvention looking to the left in Fig. 1, a portion of the shaft or well being shown in section; Fig. 3 is a side elevation of the top portion of the apparatus shown in Fig. l, with a part broken away; Fig. l vis a top plan View of my invention; Fig. 5 is an enlarged ldeing the hoisting cables tothe. elevator car;

Fig. 6 is an elevation of the brake mechanism and the means of operating the saine; Fig. 7 1s a detailed View showing a weight secured to a set or group offcables; 8

is a section on the line 8-8 of Fig. 7 Fig. 9

is a detailed viewshowing the connection of the controlling cable to means foroperating 45` an electric switch; and Fig. `10 is-aview in elevation similar to Fig.'2 and showing a modified construction of the manner of connecting the ends of a set or group of hoist'- ing cablesto the elevator car. p

Before proceeding/to a detaileddescription-of tii drawings, it may be stated that all unnecessariT framework which in'actual ,practice may be associated with the elevator construction/and which in nowayA contributes to my invention has been omitted from the drawings.

Referring to the drawings,-1 designatesy an elevator car, and 2 and 3 designate rev-- oluble traction wheels supported on a shaft mounted in bearings l secured to beams 5 or other suitable supports above the path of travel of the elevator car.A

6 and 7 designate rotatable wheels mounted upon a shalt supported in beariiigsB andV 9 which are supported upon beams 10 below the path of travel of the elevator car.

15 'designates a set or group of cables 'which are operatively connected to an arm or lever 16 located atone side of the elevator car and which is pivotally connected in any suitable mannerto the said car at the point 17. lhe hoisting cables 15 extend along the side' of the path of travel of the car trom their connection to the arm 16 upwardly over the rotatable wheel 2, and then downwardly upon the opposite side of the car andi'inderneath the rotatable guide wheel .6 and are extended thence upwardly and are operatively connected to the arm or lever 16;`

Any convenient and desirable means may be employed for operatively connecting the ends of the hoisting cables 15 to the arm 16 and indirectly to-each other. ln the drawings,.f[ have shown the ends of the cables connected to what may be termed connecting blocks orl plates. 20 to which `screwtlireaded bolts 2l are connected. These bolts V2l are connected by means of turn buckles 22 to a central member 23 which is connected at its center to the arm or lever 16.-

The opposite ends of the member 23 have screw-threaded connection with the turn buckles 22, as is `clearly shown.

The set or group of cables 25 is connected to an arm 26 at the opposite side of the elevatori-car in the same manner as the group 15 is connected to the arm 16. The points of connection of the arms 16 and 26 to the elevator car are in substantial alinement but need not necessarily be so located. Obvivously the positions of the points of connecy,tion of the arms or levers 16 and 26 to the said carinay be varied. The arms or levers 16 and 26 ,preferably extend in opposite directions .from their points of connection to the elevator car 'thatthe hoisting cables which are connected theretoniay be located in different planes, as is indicated in Figs.

' arms or levers 16 and 26 are loosely connected to the opposite ends of a shaft 28 extending underneath the bottom ot the elev vator car and secured in bearings 29 upon the bottom of such'car, but any other means may be employed to connect the arms or levers to the car.

The cables 25 extend along the side of the path or line of travel of the car upwardly from their connection to the elevator car over the rotatable wheel 3 and downwardly upon the opposite'side of the elevator car underneath the rotatable wheel 7 and up,- wardly to their point ofconnection to the arm 26.

As will be observed, the cables 15 and 25 extend around the path of travel of the car and alsoa'round two sets or groups of revoluble members, one set or group being located above the path of travel of the car and the other set or group being located below the path of travel of the car, and in the construction as illustrated each set or group consists of two re'voluble members.

In the construction shown, I have lem` ployed six cables in each group, but the number of cables in these respective groups may be varied at the will of the person installing the elevator.

In itsk movement or travel, the elevator car is guided by means of guide shoesA 30 located at lthe top and bottom of opposite sides of the car, which guide shoes are adapted to engage vertical guides (not.

shown) of known construction upon opposite sides of the elevator well or shaft. The bottom portion of the elevator well or shaft is shown at 31.

35 designates a weight consisting preferably ot two plate-like members, as indicated in Fig. 8, which are clamped to the cables 15 by means of rivets 37. 3S designates a similar weight secured to the cables 25 by rivets 39. The portions of the hoisting cables 15 and 25 located upon opposite sides of the elevator car and upon opposite sides of the revolnble wheels 2 and 3 balance each other so that there is no tendency of the said cables to move, independently of other forces, in either direction. This balancing, however, is destroyed by reason of the presence ot the weights 35 and 8S so that without the presence ot some holding or 'oninterbalancing means, such cables would move in response to the action of the said weights when the latter are ilocated or situated in an elevated position. als a matter of fact, these weights .are so arranged that they tend to lift the elevator car, together with any loa-d which it may contain, and thus assist whatever 'means may be employed for raising the elevator car and its load.

In the construction shown, I have eniployed an electric motor, shown at 40, for the purp'ose of controlling the movements ot the elevator car upwardly and downwardly.

41 designates a shaft extending from the motor to a point between the revoluble wheels 2 and 3.

42 designates a driving gear wheel which engages with gear teeth 43 upon the `adjacent faces of the said wheels 2 and 3. Revolution of this gear wheel in one direction occasions revolution of the wheels 2 and 3 in opposite directions.

The'motor 40 is supported manner. In the construction shown, it is supported upon a cross member or beam 45 which extends between and is secured to the beams 5. v

50 designates contact posts or members connected to the motor by means of conductors 51. The current may be permitted to pass through the motor in opposite directions by moving the contact blades 52 from their central position shown in Fig. 3 in either direction into Contact with one or the other of the contact posts or members 50. Passage of the current through the motor in one direction occasions revolution of the gear wheel 42 and of the wheels 2 and 3 in certain directions. it passage oit the current through the said motor in the opposite di rection occasions a reverse revolution of' the said wheels. By this means movement ot theelevator car up or down is occasioned.

rlhe contacts 52 are operatively supported upon a shaft 56, revolution of which may bc occasioned in a 'manner to be hereinafter de scribed. When the contacts 52 are in the position indicated in Fig. 3, the electric current is not permitted to pass through the motor, consequently there is no tendency for the shaft 41 and the gear wheel 42 thereon to revolve except as such tendency may he occasioned by the weight of the elevator car and such load as may be iarricd thereby exerted upon the said shaft through thc traction wheels 2 and 3. To prevent revolution of this shaft due to such cause, I have provided the brake mechanism shown in detail in Fig. 6, in which 60 designates a brake wheel rigidly secured to the shatt 4l.

62 designates a brake band connected to one en d. ot' the lever 63 pivotally supported intermediate its ends upon a stationary support 64. The bandfis extended around the brake wheel and is connected to a projection 65 from the central portion ot' tho lever 63. The opposite end ot the lever 623 is connected to a link 66 which is pivotally connected to a partially revoluble wheel 6T rigidly sein any suitable coast-fia i f 4the brake wheel 60.

Movement ofthe shaft 56 and the parts carried thereby, including the wheel 67 and the contacts 52, is occasioned by means of a controlling cord or cable 70` extending th'rou h the elevator car. This cord or cable extend mechanism constituting my improved construction and underneath a guide roller 72 located at the bottom of such mechanism. After passing over the roller 71 the end of the cord or cable-70 is carried underneath and artially around a wheel 7,3 rigidly se-v curedJ to the shaft 56 and is connected thereto by being extended through the rim of the .wheel and havingA a head formed thereon, as indicated at 75 in Fig. 9.

The opposite end of the cord or cable 7 O extends from the' guide roll 72 upwardly, over, and partiallyjaround the wheel 73 and is secured theretoat the point 76. When l cord 70 and occasions partial revolution ofv 'the lsame as is shown in the other fi the-drawings. lInthe construction s own vin it is desired to .releasethe brake band 62 from the brake wheel and to move the contact blades 52 from the intermediate position shown in Fig. 3 downwardly into contact with the lower Contact post or member 50, the operator or conductor intheele- .vator car `pulls down upon the controlling the wheel 73 and the parts connected thereto to the right. If V'a movement in the, opposite direction is `desired to carry the contacts52 upwardly into contact .with the other contact post or member 50, the cord is pulled upwardly by the operator or conductor in the elevator car.

T h arrangement and relation of the parts are such that if it is desired by the conductor or operator in the car to occasion upward movement thereof, he pulls vdown- Wardly upon thecable 70, whereas if it is desired to occasion downward movementof the elevator car vfrom an-1ele.vated position, the operator or `conductor 1n. the car pulls upwardly .upon the controlling cable 70.

In -F ig. 10, I have shown a modified construction vof the manner of operatively conmeeting 'the ends cfa set `orgroup of cables' tothe elevatorcarandto each other. Other- Ivise ythe construction shown in this ligure is res of Fig. 10, lthecables in aigroup .or set 80 are connected. at one `,end to a connecting plate or block 81, which in turn is connected to a :rod 82 :having screw-threaded connection with :a ,turn buckle 83 which. `has screwtlireaded-.ccnnection with, a rod vor bolt 8st,-

s over a guide roll 71 at the top of the 4 opposite ends of the cables are connected to a connecting block 87 which is connected -to a bolt or rod 88 having screw-threaded connection with a turn buckle 89, 'the latter in turn having screw-threaded connection With a rod or bolt 9G which is connected at 91 to the arm 86. lt will be seen that the point of connection of the rod or bolt to the arm or lever 86 further away from the pivotal point of vconnection 92 of the arm 86 ,to the elevator car than is the point of connection of the bolt 3l to the said arm. lhe cables of the set or group 93 are connected to the arm 94 in the same manner as the cables 8O are connected to the arm 36. ln this construction, the ends oi the hoisting ncables 8O and 93 which are connected to the 'arms 86 and 94 at points furthest away from their centers of movement, are moved through greater distances, due to the pivotal movements of the said arms, than the ends which are connected to the said arms nearer to their centers of movement. By this means any. undue stretch of the cables due to the weight of the car is taken up.

In ythe construction shown, the traction wheels 2 and 3 are located in4 planes substantially parallel with the sides of the elevator car. These wheels, however, may be placed diagonally with respect to the car, in which case the operation would be the same asin the construction shown.

By my construction, I secure a maximum of safety by reason of: the fact that I d'o not depend upon a single cable or set or group of cables to support the elevator car; and, furthermore, the cables are not located in the elevator shaft or well above the elevator car, consequently there should befa dis# ruption oi: one of the sets of cables, they would not in falling strike the elevator car, thus removing a great element of danger in electric traction elevators, as heretofore constructed, so far as I am aware.

As already stated, the portions of the cables upon opposite sides of the traction wheels 2 and 3 balance each other, such balance being destroyed, however, in the coustruction shown by the provision of weights 35 and 38 secured` respectively to the groups of cables 15 and 25 upon opposite sides of the traction wheels 2and 3. These weights are connected to the hoisting cables in such positions that when the elevator car is :at the bottom of its shaft orfpath of travel, theA weights are located at their highest points and-by virtue of their weight tend to lift the elevator car. When the positionsof theweights and the elevator car are reversed, the car being at 'the top ci. its shaftor path of travel and the Vweights at the lowerniost point ottheir A paths o travel, thecar exerts an upward or lifting force upondheweights. It will -be its highest to its lowest position, consists in the work necessary to raiseand lower the excess ot weight of the weights over the weight ot' the car or the excess ot weight of the latter, including the load carried thereby over that otl the weights. For instance, it the car weighs one thousand pounds and the weights each one thousand pounds, theY excess of weight ot the latter over the car is one thousand pounds, consequently the motor `must needs lift or lower not more than one thousand pounds. Let us now assume that a load of two thousand pounds is placed upon the elevator car, the car and its load' making a total weight ot three thousand pounds. It the car'is at the bot- 'tom otits shaft or path of travel, the force exerted by the weights and 88 being equal to two thousand pounds will leave but one thousand pounds to be lifted by the motor.

`YIf the car in this instance occupies an elevated position and it is desired to lower the same, it is only necessary for the motor to resist the weight of one thousand pounds.

The amounts of the weights and load may be Varied, as desired, but, however varied the y principle of construction and'operation remains the same.

`The term car employed herein is used in the broadest possible sense to include not only elevator passenger and freight carrying cars, but also to include any form of carrier in an elevator which is adapted to support a load of 'any character and transport the same from one point to another.

Having thus described my invention, I claim:-

1. In an elevator, the combination of a car, supporting means therefor, hoisting cables operatively connected to the said car and respectively extending upwardly along opposite sides of the path of travel of the car and over the said supporting means, and each cable extending downwardly along the side of the path of travel of the car opposite to the side along which it first extended, and the said cables respectively extending from the second named sides to the sides of the path of travel o f the car along which -theywere first extended andv being operatively connected to the car and means for occasioning movement of thev said cables to raise and lower the said car..

2.- lln a traction elevator, the combination of a car, revolnble Wheels for supportingthe car, hoisting cables'operatively connected to the said car, and the said cables extending respectively car and ill-opposite directions over the said from their points ot4 connectionalong the sides of: the path ottravel of thel wheel-s and thence downwardly upon the opposite sides of thc said path of travel and thence to the sides of the said path of travel along which they were lirst extended, and the said cables being respectively extended to the `car to which they are operatively connected, and means for revolving the said wheels to occasion movement of the said cables and the car connected thereto.

3. In a traction elevator, the combination of a car, traction wheels located in an elevated position above the car, a hoisting cable, means for operatively connecting the cable to the car, the cable being connected to the said means at a point. located outside the plane of a side of the car and extending from its point of connection over one of the said traction wheels and downwardly along the opposite side of the path of travel of the car and thence to the first-named side of the car where it is connected to the said means, a second cable, means `for connecting such second cable to the car, the said second` cable being connected to the said means at a point beyond the opposite side of the car and extending upwardly over another ol the traction wheels and downwardly along the firstnamed side ot the car and thence to the said second means to which it is connected, and means for oceasioning revolution of the said traction wheels.

Il. In a traction elevator, the 4combination of a car, revolnble traction wheels located above the path of travel ot the c'ar, hoisting cables, means for ope atively connecting the cables to the car, the points 01"' connection between the said cables and the said means being located outside the planes of opposite sides ot the car, and the said cables extending from their points or connection to the said means upwardly and over the respective wheelsand downwardly upon opposite sides oi" the elevator well or shaft and thence to the opposite sides of the elevator well or shaft to the said means to which they are connected, and means for occasioning revolution of the said traction wheels.

5; ln an electric traction elevator, the combination of a car, revoluble tract-ion wheels supported above the path ot travel of the said car, a plurality of groups of hoisting rables operatively connected to the car and extending from their points ot connection along the opposite sides of the path oit travel of the car upwardly over the respective traetion wheels and downwardly upon the opposite sides of the car and thence across to the i'rst-named sides of the path of travel ot the car and upwardly to the said car to which they are connected, and means for occasioning movement ot the said cables to raise and lower the said car.

6. In a traction elevator, the combination of a car, revolnble traetibn wheels supported above the path of travel of the car, guide entails.

wheels located below the path of travel of the r said car, -a plurality of groups of'hoisting cables-operatively connected to the car and extending upwardly upon opposite sides of the path of travel of the car over the respective traction wheels and downwardly upon opposite sides-of the path .of travel of the car and thence underneath the guide 'wheels and upwardly upon the firstnamed sides .of the path of travel to the Vcar to 4 which they are operatively connected, and means for occasioning movement of the said vcables over the said wheels, whereby movethe said traction wheels and across a central vertical plane through the saidV car, the said plane being parallel with the ,axes of the said traction wheels and the said cables respec tivelyy supporting the opposite sides of the car, and means for occasioningl revolution of the said traction wheels whereby movement of the said car is ellected.

S. ln a trac-tion elevator, the combination of a ear, revoluble traction wheels supported above the path of travel of the car, hoisting` cables operatively connected'to the said car..

and extending in opposite directions over the said traction Wheels and entirely around the car, and means for occasioning revolution of the'said traction wheels, whereby movement of the oar is elfected.

9. In a traction elevator, the combination of a car, revoluble traction wheels supported above 'the path of travel of the car, hoisting cables in different vertical planes connected to the, said car, the said cablesextending in opposite directions over thesaid traction wheels entirely around the said car, and means for occasioning revolution of the trac tion wheels, whereby movement of the car is eliected.

10. In a traction elevator', the combination of a car, revoluble traction wheels supported above the path of travel of the car, arms connected to the said-car and being located at opposite sides thereof, a hoisting cable or group of cables having its or their opposite ends operatively connected'to one of the said arn1s, a second hoisting cable or group of cables having its or their opposite ends connected to the other of saidarms, the said cables extending in opposite-directions over the said traction wheels and entirely around the said car, and means for occasioning revolution of the said traction wheels whereb movement ofthe car 1s eiec'ted.

1l. In a traction elevator, the combination of a car, revoluble traction wheels supported above 4the path of travel kof the car, arms pivotally connected to the said car and being located at opposite sides thereof, the said arms extending in opposite directions, hoisting cables having their op osite ends operatively connected to the sal arms, the said cables extending in opposite directions over the said traction wheels and entirely around the said car, and means for occasioningrevolution of the saidptraction wheels,

whereby movement of the car is eected.'

12.- In an elevator, the combination of a car, revoluble wheels supported above the path of travel of the car, cables connected to t 1e said car and extending over the said wheels and entirely around the said car, weights connected to the said cables upon opposite sides'ot' the carafter their passage over the said wheels, land means for occasioning revolution of the said wheels to operate the said car.

13. -In anelevator, the combination of a car, revoluble wheels supported in axial -alinement above the pathv of travel of the car, guide wheels supported below the path of travel of the said car, hoisting cables 0p.

sol

eratively connected to the said car and extending in opposite directions from their points of 4connection to the said car over the said revoluble wheels and under the said guide wheels,`weights connected to the said cables upon the opposite sides of the said car to assist in lifting the said car, and means for occasioning the'. revolution of the rst-named wheels to elfect movement of the said car. 14. In an elevator, the combination of a car, revoluble traction wheels supported in axial alinement, guide wheels, cables operatively connected to the car and respectively extending from their points of connection over the said traction wheels and under the said guide wheels, Weights secured to thecables after the cables have passed beyond the said traction wheels, and means for occasioning revolution of the said traction wheels to eiilect movement of the said car.

15. In an elevator-,the combination of a car, traction wheels supported above the pathof travel the said car, the said wheels being provided 'with gear teeth, guiding devices supported below the path of travel of the" said car,` cables respectively Aoperatively connectedy to' the said car and respectively ,extending from opposite sides over the said posite sides of the car for connecting the said cables to the said car, the said cables respectively extending around the said traction wheels and guide devices, and'the opposite ends of each of the said cables being connected to one or the other of said means, the saidJcables supporting opposite sides of thesaid car, and means to occasion revolu tion of the said traction Wheels.

17. In a traction elevator, the combination of a car, revoluble traction Wheels supported above the path of travel of the car, arms connected to the said car and being located at opposite sides thereof, hoisting cables respectively connected to the said arms, the' said cables respectively extending in opposite directions over the said traction wheels and entirely around the said car, and means for occasioiiing revolution of the said traction wheels whereby movement of the car is edected.

. l18. In an elevator, the combination of a car, supporting means located above the path of travel of the car, arms pivotally connected to the said ear and being located at opposite sides thereof, hoisting cables each of which has both of its ends operatively connected to one or the other of the said arms, the said endsy being connected to the said arms at points unequally distant from the pivots thereof, the said cables extending over the said supporting means, and means for occasioning revolution of the said supporting means" whereby movement of the said car is effected.`

19. In an elevator, the combination of a car, supporting means located above the path of travel of the car, guiding means lo-v i tions located on one side of the car and its central body portion located on the other side'of'the car, another cable having both ends-operatively connected to the car and both-'df its end portions located on the said 'other side of the car and its central body portion located on the first-mentioned side of the car, the said cables passing over the said supporting means and under the said guiding means.

' 20. In an elevator, the combination of a car, revoluble supporting means supported in axial Valinement above the path of travel of the car, guiding means located Ybelow the path of travel of the car, parallel4 hoistingcables connected to the said carand extending from their points of connection in op- -posite directions parallel to each other over the said revoluble supporting means and thence underneath the guiding means in opposite directions and upwardly tothe car,

.and meansfor oecasioning revolution of the said revoluble means in opposite directions. `21. In an elevator, the combination of'a posite directions over the said revoluble supporting means and entirely around the said car, and means for oceasioning revolution oi the said supporting means whereby movement-ot' the car is eti'ected.

Q2. In an elevator, the combination oi: a car, supporting means located above the path of travel of the ear, cable guiding means located below the path oi travel of the car, arms located at the opposite sides of the said car and pivotally connected to it, hoisting cables each of which has both of its ends operatively connected to one or the other ol said arms, the said cables respectively extending upwardly and downwardly from their points of connection passing over the said supporting means and under the said cable guiding means and the distance of the i the cable or cables to the said arms from the axes of movement of the arms being less than the distance of the point of connection oi the end or ends of the downwardly extend ing portion or portions of the cable or cables to the said arms from the axes of movement of the arms, the said cables extending around the path of travel of the said car. 23. In an elevator, the combination of a car, a set or group of revoluble members supported above the path of travel of the car, a set or group of revoluble members located below the path of travel of tlie car, hoisting'cables operatively connected to the car and passing around the said sets oi groups of members and entirely around the path of travel of the car, and means for occasioning revolution of one of the said sets or groups of members to occasion movement of the said cables.

24. In an elevator, the combination of a car, a pair of revoluble members supported above the path of travel of the car, a pair of revoluble members located below the path of travel of the car,v hoisting cables operatively connected to the car and passing entirely around the path of travel of the car, the said cables extending in opposite directions over the first-named pair of revoluble-members and under the second-named pair of rev'olu ble members, and means for oceasioning revolution of one of the said pairs of -mcinbers to drive the said cables.

f2.5. In a traction elevator, the combination of a ear, revoluble traction wheels su )ported above the path of travel of the'car, ioisting cables, means for connecting thevcables to the car, the points of connection of the4 said cables to the said means being lcated O utside the planes of opposite sides of the car, and the said cables respectively extending in opposite directions overr the said. traction wheels and over the said car and respectively supporting the said opposite sides o i the car, and means for'occasioning-revolution of 'the said traction wheels whereby movement of the said car is effected.

26. In a traction elevator, the combination of a car, revoluble Atraction wheels supported above the path of travel of the can, a shaft supported `upon the car, arms loosely con-` nected to the said shaft and being located beyond the planes of opposite sides of the car, hoisting cables having their opposite ends operatively connected to the said arms, the said cables extending inV opposite directions over the said traction wheels andentirely around thesaid car, and means for occasioning revolution of the said traction wheels whereby movement of the caris 'effected. w

27. In a traction elevator, the combination nected to the said arms, the said cab es eX- tendingin opposite directions over the irstnamed set of revolnble members and under the second-named set of revoluble members,

and means for occasioning revolution of one of the said sets of revoluble members whereby movement of the car is efected.

. In testimony. that I claim the foregoing as my invention, I have hereunto signed my naine this 2nd day of January, A. D. 1908.

DE wiTT o. 'sUPLEn In the presence ofy CYnUs N. ANDERSON, S. SALOME BROOKE. 

